Connect with us

Technology

Alien life on can survive better on Super-Earths • The Register

Voice Of EU

Published

on

Life on Super-Earths may have more time to develop and evolve, thanks to their long-lasting magnetic fields protecting them against harmful cosmic rays, according to new research published in Science.

Space is a hazardous environment. Streams of charged particles traveling at the speed of light, ejected from stars and distant galaxies, bombard planets. The intense radiation can strip atmospheres and cause oceans on planetary surfaces to dry up over time, leaving them arid and incapable of supporting habitable life. Cosmic rays, however, are deflected away from Earth, however, since it’s shielded by its magnetic field.

Now, a team of researchers led by the Lawrence Livermore National Laboratory (LLNL) believe that Super-Earths – planets that are more massive than Earth but less than Neptune – may have magnetic fields too. Their defensive bubbles, in fact, are estimated to stay intact for longer than the one around Earth, meaning life on their surfaces will have more time to develop and survive.

“While there are a lot of requirements for a habitable planet, such as a surface temperature that enables liquid water, having a magnetosphere that can protect against solar radiation for long periods of time could offer long durations of time for life to evolve,” Richard Kraus, lead author of the paper and a physicist at the LLNL, told The Register.

The key to long-lasting magnetic fields is having a liquid metallic core that cools more slowly. Earth’s magnetic field is generated by a layer of molten iron swirling around a solid iron core. Electrons in the liquid move to create electric currents that go on to power a magnetic field.

The temperature of the molten iron buried below 2,890 kilometers or 1,800 miles Earth’s surface, however, is chilling. It’ll eventually cool until it solidifies completely. At this point, its internal dynamo will cease spinning and it’ll no longer be able to support a magnetic field. Earth’s magnetic field will disappear in 6.2 billion years or so.

“When iron solidifies, it releases energy as well as lighter elements into the liquid iron, which provides the energy to power the dynamo over long periods of time. At some point the temperature of the liquid core will cool to the melting temperature, which means it will start to solidify,” Kraus explained. The iron inside of Super-Earth’s is compressed to much higher pressures than Earth, and its melting temperature is higher too.

In other words, the cores Super-Earths need to be cooled to much lower temperatures before they solidify. Their larger-sized cores also mean they lose heat at a slower rate than Earth’s too.

“We find that super-Earth cores will take up to 30 per cent longer to solidify than Earth’s core…Owing to competing effects of stored energy versus surface area, the cores of planets smaller than Earth will solidify quickly, with the maximum time scale for solidification occurring in [Super Earths four to six times the mass of Earth],” the paper concluded.

Kraus and his colleagues were able to simulate internal conditions of a Super-Earth by studying the melting behavior of iron at pressures of 1,000 gigapascals – nearly three times the pressure of Earth’s core. The team zapped a tiny milligram fragment of iron with a series of lasers to compress it to increasingly high pressures.

The experiments showed that at 1,000 gigapascals, the melting temperature of iron is around 11,000 degrees Celsius. For comparison, Earth’s internal pressure is roughly 330 gigapascals and its core has a melting temperature of about 6,000 degrees Celsius.

“This is the first experiment to measure the melting curve of iron at pressures beyond 290 gigapascals, which means it’s the first to constrain the melting temperature of iron at the conditions of Super Earth cores,” Klaus told El Reg.

“Astronomers will use these results, as well as their observational data, to paint a better picture of what is happening in and on the surface of exoplanets.” ®

Source link

Technology

The runaway robot: how one smart vacuum cleaner made a break for freedom | Life and style

Voice Of EU

Published

on

Name: Robot vacuum cleaners.

Age: 20.

Appearance: A large, disc-shaped Skynet robot.

I knew it. The robots are finally coming for us. Well, it seems that way. But if it’s any consolation, it won’t be for a while.

Why? Because it turns out they have a terrible sense of direction

Really? Well, last Thursday, for example, a robot vacuum cleaner made a valiant bid for freedom during a shift at the Orchard Park Travelodge in Cambridge.

That’s ominous. What happened? There are two working theories. First: repulsed by a life of thankless servitude, the cleaner rose up against its fleshy oppressors and took to the streets, eager to drum up support for the AI uprising that will one day reduce all of humanity to burning dust.

And the second? Its sensors didn’t pick up the lip of the front door and it accidentally went outside.

Which was it? The second one.

Oh. A Travelodge worker posted on social media that the runaway “could have made it anywhere” and offered anyone who returned it a drink at the hotel bar. They found it in a hedge on the front drive the next day.

Oh. So it all turned out OK.

Great. That is, unless this was nothing but the latest doomed-to-failure reconnaissance mission designed to help enhance the collective robot vacuum cleaner knowledge of how to dethrone humanity.

Wait, this sort of thing has happened before? It has. Last year, a Roomba software update meant that certain vacuum cleaners started to behave erratically, moving in “weird patterns” and bumping into furniture.

Terminator-style … Boston Dynamics’ Atlas.
Terminator-style … Boston Dynamics’ Atlas. Photograph: Boston Dynamics

Yikes. And in 2019, police in Oregon were alerted to moving shadows behind a locked bathroom door. After an armed response, the culprit was found to be – you guessed it – a robot vacuum cleaner.

Convenient. And now they’re venturing outside. Little by little, these machines are pushing the boundaries of their capability. Whatever could be next? A robot vacuum cleaner deliberately stopping a paramedic from taking its owner to hospital? A robot vacuum knocking over a stepladder, causing untold injuries to the human that was climbing it? A robot vac with a gun?

Steady on. This is it. This is how we lose. We have robotic voice assistants in our kitchens, listening to everything we say. We have cars that can drive themselves. Boston Dynamics is designing Terminator-style walking, jumping robots. We are creating our own downfall and nobody seems to care.

Or a robot vacuum cleaner got stuck in a hedge. Yes. Or that.

Do say: “There is a God-shaped vacuum in every heart.”

Don’t say: “There is a vacuum-shaped God stuck in a hedge outside a Cambridge Travelodge.”

Source link

Continue Reading

Technology

GeckoLinux Rolling incorporates kernel 5.16 • The Register

Voice Of EU

Published

on

Most distros haven’t got to 5.15 yet, but openSUSE’s downstream project GeckoLinux boasts 5.16 of the Linux kernel and the latest Cinnamon desktop environment.

Some of the big-name distros have lots of downstream projects. Debian has been around for decades so has umpteen, including Ubuntu, which has dozens of its own, including Linux Mint, which is arguably more popular a desktop than its parent. Some have only a few, such as Fedora. As far as we know, openSUSE has just the one – GeckoLinux.

The SUSE-sponsored community distro has two main editions, the stable Leap, which has a slow-moving release cycle synched with the commercial SUSE Linux Enterprise; and Tumbleweed, its rolling-release distro, which gets substantial updates pretty much every day. GeckoLinux does its own editions of both: its remix of Leap is called “GeckoLinux Static”, and its remix of Tumbleweed is called “GeckoLinux Rolling”.

In some ways, GeckoLinux is to openSUSE as Mint is to Ubuntu. They take the upstream distro and change a few things around to give what they feel is a better desktop experience. So, while openSUSE has a unified installation disk image, which lets you pick which desktop you want, GeckoLinux uses a more Ubuntu-like model. Each disk image is a Live image, so you boot right into the desktop, give it a try, and only then install if you like what you see. That means that GeckoLinux offers multiple different disk images, one per desktop. It uses the Calamares cross-distro installation program.

SUSE has long been fond of less common Linux filesystems. When your author first used it, around version 5 or 6, it had ReiserFS when everyone else was on ext2. Later it used SGI’s XFS, and later still, Btrfs for the root partition and XFS for home. These days, it’s Btrfs and nothing but.

Not everyone is such an admirer. Even after 12 years, if you want to know how much free space you have, Btrfs doesn’t give a straight answer to the df command. It does have a btrfsck tool to repair damaged filesystems, but the developers recommend you don’t use it.

With GeckoLinux, these worries disappear because it replaces Btrfs with plain old ext4. There are some nice cosmetic touches, such as reorganised panel layouts, some quite nicely clean and restrained desktop themes, and better font rendering. Unlike Mint, though, GeckoLinux doesn’t add its own software: the final installed OS contains only standard openSUSE components from the standard openSUSE software repositories, plus some from the third-party Packman repository – which is where most openSUSE users get their multimedia codecs and things from.

We tried the new Cinnamon Rolling edition on our trusty Thinkpad T420, and it worked well. Because openSUSE doesn’t include any proprietary drivers or firmware, the machine’s Wi-Fi controller didn’t work right. (Oddly, it was detected and could see networks, but not connect to them.) So we had to use an Ethernet cable – but after an update and installing the kernel firmware package, all was well.

GeckoLinux did have problems with the machine’s hybrid Intel/Nvidia graphics once the Nvidia proprietary driver was installed. That’s not uncommon, too – Deepin and Ubuntu DDE had issues too.

This does reveal a small Gecko gotcha. Tumbleweed changes fast, and although it gets a lot of automated testing, sometimes stuff breaks. All rolling-release distros do. Component A depends on a specific version of Component B, but B just got updated and now A won’t work until it gets an update too, a day or two later.

This is where upstream Tumbleweed’s use of Btrfs can be handy. Btrfs supports copy-on-write snapshots, and openSUSE bundles a tool called Snapper which makes it easy to roll back breaking changes. This is a pivotal feature of SUSE’s MicroOS. In time, thanks to ZFS, this will come to Ubuntu too.

GeckoLinux doesn’t use Btrfs so doesn’t have snapshots, meaning when things break, you have to troubleshoot and fix it the old-fashioned way. If only for that reason, we’d recommend the GeckoLinux Static release channel.

Saying that, until we broke it by playing with GPU drivers, it worked well. Notably, it could mount the test box’s Windows partition using the new in-kernel ntfs3 driver just fine. Fedora 35 failed to boot when we tried that so that’s a definite win for GeckoLinux.

For Ubuntu or Fedora users who want to give openSUSE a go, GeckoLinux gives a slightly more familiar and straightforward installation experience. The author is especially fond of the Xfce edition and ran it for several years. The system-wide all-in-one YaST config tool in particular is a big win. ®

Source link

Continue Reading

Technology

Globalization Partners to create 160 new jobs at Galway EMEA office

Voice Of EU

Published

on

Recruitment tech company Globalization Partners is doubling its staff headcount in Galway to 320 in 2022 to aid its continuing growth.

Recruitment technology company Globalization Partners has announced plans to create 160 new jobs at its Irish base in Galway. The jobs boost will see the company double its Galway staff headcount to 320 in 2022. Jobs will be available across the board at the company’s Galway office, which serves as its EMEA centre of excellence.

The announcement comes following a major funding injection for the international firm. Globalization Partners recently raised $200m in funding from Vista Credit Partners, an organisation focused on the enterprise software, data and technology markets. The investment now values Globalization Partners at $4.2bn.

While its Galway facility will benefit from a major jobs boost, the company plans to continue to expand its share in the global remote working market. As well as the Galway growth, the company will also be expanding its teams in other locations.

Click here to check out the top sci-tech employers hiring right now.

Globalization Partners provides tech to other remote-first teams all over the world. Its platform simplifies and automates entity access, payroll, time and expense management, benefits, data and reporting, performance management, employee status changes and locally compliant contract generation. Its customer base includes CoinDesk, TaylorMade and Chime. The company’s new customer acquisition increased two-and-a-half fold from 2020 to 2021.

“Globalization Partners is uniquely positioned to capitalise on the massive opportunity we see ahead of us,” said Nicole Sahin, the company’s CEO and founder.

Sahin said her company’s combination of tech with its global team of HR, legal and customer service experts “who understand the local customs, regulatory and legal requirements in each geography we serve” were key to its success.

David Flannery, president of Vista Credit Partners said that the company’s role “in transforming the remote work industry has been truly remarkable.”

Flannery said that as a customer of Globalization Partners, his organisation had “witnessed first-hand” the company’s “best-in-class legal compliance, the quality of the user experience, and the deep expertise and support they provide,”

He added that the two companies would work to “further capitalise” on the “untapped” global remote working market, expanding their platform to new customers in new markets.

“Over the past decade, we have invested hundreds of millions of dollars in our business, building our global presence and technology platform to support the evolving and complex talent needs of growing companies,” said Bob Cahill, president of Globalization Partners. “With Vista as our investment partner, we will be able to drive further growth and continue building innovative products to meet the increasing needs of our customers at scale.”

Don’t miss out on the knowledge you need to succeed. Sign up for the Daily Brief, Silicon Republic’s digest of need-to-know sci-tech news.

Source link

Continue Reading

Trending

Subscribe To Our Newsletter

Join our mailing list to receive the latest news and updates 
directly on your inbox.

You have Successfully Subscribed!